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How are 3D games so efficient? [closed]
...render, and
They take special advantage of your hardware.
For instance, one easy optimization you can make involves not actually trying to draw things that can't be seen. Consider a complex scene like a cityscape from Grand Theft Auto IV. The renderer isn't actually rendering all of the buildings...
Overloading Macro on Number of Arguments
...OO(foo,bar,baz) # expands to FOO3(foo,bar,baz)
If you want a fourth one:
#define GET_MACRO(_1,_2,_3,_4,NAME,...) NAME
#define FOO(...) GET_MACRO(__VA_ARGS__, FOO4, FOO3, FOO2)(__VA_ARGS__)
FOO(a,b,c,d) # expeands to FOO4(a,b,c,d)
Naturally, if you define FOO2, FOO3 and FOO4, the ...
What's “P=NP?”, and why is it such a famous question? [closed]
...e set of symbols can be written and read. At any given time, the TM is in one of its states, and it is looking at a particular cell on the tape. Depending on what it reads from that cell, it can write a new symbol into that cell, move the tape one cell forward or backward, and go into a different ...
What is a plain English explanation of “Big O” notation?
...integers. But a comparison of two algorithms to do arithmetic operations (one multiplication, one addition) will tell you something meaningful;
representation: Big-O (in its simplest form) reduces the comparison between algorithms to a single variable. That variable is chosen based on observations...
Message Queue vs Message Bus — what are the differences?
...ecouple various systems.
Tibco by contrast was (sold as a) messaging backbone, where you could have multiple publishers and subscribers on the same topics.
Both however (and newer competing products) can play in each other's space these days. Both can be set to interrupt as well as polling for ne...
There can be only one auto column
How do I correct the error from MySQL 'you can only have one auto increment column'.
4 Answers
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What is the benefit of using Fragments in Android, rather than Views?
... weight and simpler to implement.
At first, I actually tried to build a phone/tablet app using custom views. Everything appeared to work across phones AND tablets, even switching from single panel to split panel. Where I ran into trouble was with the back button and life cycle. Since I was simpl...
ETag vs Header Expires
...le to figure out if I should use both an ETag and an Expires Header or one or the other.
8 Answers
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Why prefer two's complement over sign-and-magnitude for signed numbers?
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It's done so that addition doesn't need to have any special logic for dealing with negative numbers. Check out the article on Wikipedia.
Say you have two numbers, 2 and -1. In your "intuitive" way of representing numbers, they wou...
Change templates in Xcode
...er hierarchy (or wherever you installed your developer tools).
Instead, clone the templates you want to have customized variants of. Then change their names and the information in them. Finally, put them in the appropriate location in your account's Library/Application Support folder, specificall...